Composition for the dyeing of human hair

ABSTRACT

Hair dyeing composition on the basis of an oxidation dyestuff precursor reacting with peroxide, comprising at least one developing and/or coupling substance selected from the group
         a) 3-chloro-p-aminophenol,   b) 2-methyl-5-γ-hydroxypropyl aminophenol, 2-methyl-5-methyl aminophenol, 2-methyl-5-ethyl aminophenol, 2-methoxy-5-aminophenol, 2-methyl-4-methoxy-5-aminophenol, and/or 2-methyl-4-methoxy-5-hydroxyethyl aminophenol, and   c) 2-(diethyl amino methyl)-p-aminophenol, and/or 2,6-dichloro-p-aminophenol or the water-soluble salts thereof.

The present invention concerns a composition for the dyeing of humanhair on the basis of an oxidation dyestuff precursor system reactingwith peroxide which provides long-lasting, intensive colors either usedas such, or which can be used to obtain further shades in combinationwith additional developing and/or coupling agents and which does notdamage the hair even upon repeated application within short intervals.

The developing substances still most frequently used in hair dyeingcompositions are 1,4-diaminobenzene (p-phenylenediamine) and1-methyl-2,5-diaminobenzene (p-toluylenediamine). Although incorporationof these substances largely fulfills the user's color wishes, there arestill shades that cannot be completely achieved by the use thereof.

Proposals have also been made to close this gap by the use ofalternative developing substances. To a limited degree this is possiblewith the use of tetraminopyrimidine or 2-(2,5-diaminophenyl)ethanol (seeEP-B 400 330); however, it is then necessary to accept reduced colorintensity in other shades.

A further satisfactory solution of this problem is disclosed in EP-A 615743, with the use of 2-(2′-hydroxyethyl amino)-5-aminotoluene or thewater-soluble salts thereof, and 3,4-diamino-5-hydroxypyarazole ascomponents of oxidation hair dye compositions. However, to the presentit has not been possible to achieve strong colorations in the range ofcopper-red, violet and brown-violet by this means.

The invention starts from the task of counteracting this deficiency andproviding an oxidation dyestuff composition which achieves intensive,glossy colorations, especially in the range of copper-red, violet andbrown-violet, and which leaves the hair without damage even uponrepeated application within short periods of time.

This task is solved when such a hair dyeing composition comprises anoxidation dyestuff system reacting with peroxide which is selected froma) 3-chloro-p-aminophenol, b) 2-methyl-5-γ-hydroxypropyl-aminophenol,2-methyl-5-methyl aminophenol, 2-methyl-5-ethyl aminophenol,2-methoxy-5-aminophenol, 2-methyl-4-methoxy-5-aminophenol, and/or2-methyl-4-methoxy-5-hydroxyethyl aminophenol, and c) 2-(diethyl aminomethyl)-p-aminophenol, and/or 2,6-dichloro-p-aminophenol or thewater-soluble salts thereof.

After oxidation with peroxide, use of these compositions on the basis ofa customary carrier provides very expressive, intensive, long-lastinghair colorations, especially in the range of brown, violet andbrown-violet, which can be varied to achieve further shades by theaddition of the respective further developing and coupling substances.

In addition to the named developing and coupling substances it is alsopossible to incorporate further substances of this type.

These are, for example, 1-methoxy-2-amino-4-(β-hydroxyethylamino)benzene, 2-amino-3-hydroxypyridine,3-amino-2-methylamino-6-methoxypyridine, resorcinol, 2-methylresorcinol, 4-chlororecorcinol, 2-amino-4-chlorophenol,1,3-diaminobenzene, 1,6-dihydroxynaphthaline, 1,7-dihydroxynaphthaline,2-aminophenol, 3-amino-phenol, p-phenylenediamine, p-toluylenediamine,2,6-dimethyl-p-phenylenediamine.

The total concentration of the developing substances customarily rangesbetween about 0.05% and 5%, preferably 0.1% and 4%, in particular 0.25%to 3% by weight, calculated to the total hair dyeing composition(excluding the oxidizing agent), whereby these figures are alwaysrelated to the proportion of free base. The preferred weight proportionof the developing substances to the coupling substances ranges betweenabout 1:8 to 8:1, preferably about 1:5 to 5:1, in particular 1:2 to 2:1.

In the hair dyeing compositions according to the invention, the couplingsubstance(s) as reaction partners of the developing substance(s) arepresent in approximately the same molecular proportions as thedeveloping substances, i.e. in amounts from 0.05% to 5.0%, preferably0.1% to 4%, in particular 0.5% to 3% by weight, calculated to the totalcomposition (excluding the oxidizing agent), whereby these figures arealways related to the proportion of free base.

If desired, the compositions according to the invention can also containso-called shading agents for precise adjustment of the desired shade, inparticular direct-acting dyestuffs.

Such shading agents are, for example, nitro dyestuffs such as2-amino-4,6-dinitrophenol, 2-amino-4-nitrophenol,2-amino-6-chloro-4-nitrophenol, etc., preferably in amounts from about0.05% to 2.5%, in particular 0.1% to 1% by weight of the dyestuffcomposition (excluding the oxidizing agent).

The hair dyeing compositions according to the invention can comprise thebasic substances and additives customarily found in such compositions,conditioning agents, etc., known as state of the art and described, forexample, in the monograph by K. Schrader, “Grundlagen und Rezepturen derKosmetika”, 2nd Ed. (Hüthig Buch Verlag, Heidelberg, 1989), pp. 782 to815. They can be prepared as solutions, creams, gels or also in the formof aerosol products; suitable carrier material compositions are known asstate of the art.

For application, the oxidation dyestuff precursor is mixed with anoxidizing agent. The preferred oxidizing agent is hydrogen peroxide, forexample in a concentration of 2% to 6% by weight.

However, the use of other peroxides such as urea peroxide and melamineperoxide is also possible.

The pH-value of the ready-to-use hair dyeing composition, i.e. aftermixing with peroxide, can be in a slightly acidic range, i.e. from 5.5to 6.9, as well as in the neutral or alkaline range, i.e. between pH 7.1and 10.

In the following, various Examples are used to illustrate the invention.

Carrier

Stearyl alcohol 8.0 (% by wt.) Coco fatty acid monoethanolamide 4.51,2-Propanediol mono/distearate 1.3 Coco fatty alcohol polyglycol ether4.0 Sodium lauryl sulfate 1.0 Oleic acid 2.0 1,2-Propanediol 1.5 Na-EDTA0.5 Sodium sulfite 1.0 Protein hydrolyzate 0.5 Ascorbic acid 0.2 Perfume0.4 Ammonia, 25% 1.0 Ammonium chloride 0.5 Panthenol 0.8 Water ad 100.00

The oxidation dyestuff combinations according to the invention wereincorporated into this carrier, whereby the water content was reducedaccordingly.

The colorations were carried out on wool patches and strands of bleachedhuman hair by application of a 1:1 mixture of a dyestuff precursor and a6% hydrogen peroxide solution (pH-value of the mixture: 9.8) with twentyminutes processing at room temperature, subsequent rinsing and drying.

The following colorations were achieved:

Example 1: 0.405 (% by wt.) 3-Chloro-para-aminophenol HCl 0.1562-Methoxy-5-aminophenol 0.300 2-(Diethyl amino methyl)-p-aminophenol.2HCl Coloration: Intensive brown-orange Example 2: 0.405 (%by wt.) 3-Chloro-para-aminophenol HCl 0.2222-Methyl-4-methoxy-5-hydroxyethyl aminophenol 0.300 2-(Diethyl aminomethyl)-p- aminophenol.2HCl Coloration: red-orange Example 3: 0.405 (%by wt.) 3-Chloro-para-aminophenol 0.156 2-Methoxy-5-aminophenol 0.2002-(Diethyl amino methyl)-p- aminophenol.2HCl Coloration: brown-grayExample 4: 0.405 (% by wt.) 3-Chloro-para-aminophenol HCl 0.2222-Methyl-4-methoxy-5-aminophenol 0.200 2,6-Dichloro-p-aminophenolColoration: gray-rubin

1. Hair dyeing composition on the basis of an oxidation dyestuffprecursor reacting with peroxide, comprising a) 3-chloro-p-aminophenol;b) at least one developing and/or coupling substance selected from thegroup consisting of 2-methyl-5-hydroxypropyl aminophenol,2-methyl-5-methyl aminophenol, 2-methyl-5-ethyl aminophenol,2-methoxy-5-aminophenol, 2-methyl-4-methoxy-5-aminophenol, and2-methyl-4-methoxy-5-hydroxyethyl aminophenol; and c) at least onedeveloping and/or coupling substance selected from the group consistingof 2-(diethyl amino methyl)-p-aminophenol, and2,6-dichloro-p-aminophenol, or the water-soluble salts thereof.